Most of the times, I can track down a particular style based on its use. For example, if I want to change the style of the breadcrumbs bar, I just go into the breadcrumbs.css virtual page. Sometimes, though, tracking down the style for a particular element is a bit trickier, so I'll open up the style.css file that gets generated, look for the particular element, then look at the surrounding declarations to see if they will give me a clue as to which CSS virtual file I need to go. It would be helpful, when generating the style.css file, to add a comment line that indicates the beginning of a particular section, like:
/* ====== breadcrumbs.css =========== */
/* ====== various.css =============== */
I hope this wouldn't be too difficult to implement, and, as I mentioned earlier, it would be very helpful in zeroing in on the right CSS file.
Thanks.